کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10710311 | 1024669 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
XRD and Mössbauer spectroscopy investigation of Fe2O3-Al2O3 nano-composite
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
Fe2O3-Al2O3 nano-composites were synthesized by sol-gel means. The properties of samples sintered at various thermal treatment temperatures were investigated by X-ray diffraction (XRD) and Mössbauer spectroscopy (MS). The experimental results show that the γ- to α-Al2O3 transformation occurs at lower temperature after iron oxide doping. The samples obtained at 1173 K contained poorly crystallized γ-Al2O3 phase and an amorphous iron oxide. When the temperature of heating was increased to 1373 K, the sample was composed of α-Fe2O3/α-Al2O3 nano-composite and some solid solution. A superparamagnetic phenomenon was observed until the thermal treatment temperature reached 1373 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 294, Issue 3, July 2005, Pages 294-297
Journal: Journal of Magnetism and Magnetic Materials - Volume 294, Issue 3, July 2005, Pages 294-297
نویسندگان
Mei Liu, Haibo Li, Li Xiao, Wenxue Yu, Yang Lu, Zhudi Zhao,